The frost injury index and advection cold injury index of tropical herbage and the hot injury index of temperate herbage are found.

分别找到了热带牧草的霜冻指标、平流寒害指标以及温带牧草的热害指标。

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Based on investigations, researches and scientific experiments, the cool injury index and frost index to crops that fit the fact of heilongjiang Province are analyzed and obtained.

在调查研究和科学实验的基础上，分析出符合黑龙江省实际的农作物冷害指标和霜冻指标。

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